CVE-2023-33293: An issue was discovered in KaiOS 3.0 and 3.1

This week

MEDIUM 5.3REMOTEMITIGATE

CVE-2023-33293 is a medium-severity flaw (CVSS 5.3) affecting kaios. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in KaiOS 3.0 and 3.1. The binary /system/kaios/api-daemon exposes a local web server on *.localhost with subdomains for each installed applications, e.g., myapp.localhost. An attacker can make fetch requests to api-deamon to determine if a given app is installed and read the manifest.webmanifest contents, including the app version.

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 53%)
CISA exploited list	No
Weakness	CWE-668
Published	2023-05-22
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: kaiostech

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-05-22 16:15 UTCPublished CVE record published
2026-06-17 06:01 UTCUpdated Record last modified

kaiostech kaios MITIGATE

Affected: 3.0 · 3.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-33293?

kaios: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-33293 being exploited?

CVE-2023-33293 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-33293 affect?

CVE-2023-33293 affects kaios. Severity is medium (CVSS 5.3). An issue was discovered in KaiOS 3.0 and 3.1. The binary /system/kaios/api-daemon exposes a local web server on *.localhost with subdomains for each installed applications, e.g., myapp.localhost. An attacker can make fetch requests to api-d

How urgent is CVE-2023-33293?

Priority 40/100. Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2023-33294 CRITICAL 9.8 MITIGATE An issue was discovered in KaiOS 3.0 before 3.1

References

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